Christina Aguilera is sick of people asking when she is going to have a baby.The Dirrty singer, who is married to music executive Jordan Bratman, insists she is tired of people constantly quizzing her about her family plans.Christina, 25, who tied the knot last November, says she has no plans to have a baby and is happy concentrating on her career - for now.She said: "Everyones asking when Im going to have children. I just tell them my new album, Back To Basics, is my child. Im having twins! Its so exciting."It is not the first time Christina has compared her new record to having a baby.Earlier this year, the pop beauty said making her new album was the same as being pregnant - twice.Christina revealed she put so much effort into making Back To Basics - the follow-up to 2002's hugely successful 'Stripped' - it felt like she was nurturing a new life into the world.She said at the time: "I feel like I've been pregnant for 18 months - it's been tough."